hi, We have a server running ISA and DNS on the same machine.We r facing some problems 1. Our applicationServer supports HTTP1.1 protocol. If my Application is accessed through ISA, the ISA sets the protocol as HTTP 1.0. Does ISA supports HTTP1.1 or How to make ISA to support HTTP1.1 2. We have blocked all ports and released some ports used by our office including yahoo messengers 5050. We also released ports used by voice chat ie TCP 5000-5001, UDP 5001-5010 but we were not able to enable voice chat though we changed the settings from proxies to no proxies.the systems accessing voice chat have ISA's server's ip as the default gateway ip.Can anybody explain what should be the UDP setting.send,recieve,send-recieve,recieve-send. 3. we access mails only by outlook 2000.we dont have any internal mail server and all our systems have default gateway as ISA server's ip.We have released pop3 port outbound. but the mails are not getting downloaded into the outlook.It gives this error The tcp/ip connection was unexpectedly terminated by the server. (Account:'rajesh',POP3Server:'pop3.four-soft.com'.Error Number:0x800ccc0f). Pls tell me how to access the mails through outlook. Regards Venkat Systems & Network Engg. Four Soft Pvt. Ltd.